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.BALL -AND COMPANY.

Letters Patent No. 79,682, dated July 7, 1868.

MPROVEMENT IN v CIRCULAR-SAW MILLS.

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KNOWALL MEN BY THESEPRESENTS: v

1That I ,FMNK J. PIIUMMER, of'lthe citjr and county of Worcester, andlCommomvealth .of Massachusetts, have invented certain new and usefulImprovements 'in Resawing-'Mac'hines5 and I do herebyr declareA that.the

following is a full, clear, and exact descriptionof the same, referencebeing had to `the accompanying drawingsforming apart ofthis'specification, and in-which- Fignre 1 represents a side view of mysaid improved machine.

Figure 2 represents a front view.

Figure 3 represents a vertical section on line A B, g. 1.

Figure 4 represents a plan or top view.

Figure 5 represents a horizontal section of' a part of the machine andFigure 6 represents, upon an enlarged scale, a part of the machine, asshown in section, lig. 3, the parts being shown in two dierentpositions,one in darkl lines, 'and the other in red lines. i i Y y To enable thoseskilled in the art to wbichmy invention belongs to make and `'usc thesame, I will proceed to describe it more in detail.

My present limprovements relate to improvedmechanism for operating andadjusting the feedi-'olls A A, and, as the general construction andoperation of the other parts of themachine are well known tothoseskilled `inthe* construction and nse of machinery Vforworking.nood, a detailed description ofthe machine will be unne cessary,and' therefore my description of the machinerepresentedin the drawingswill be confined more particw larly to my special improvements.Y Y o Theshafts 'B B ofthe feed-rolls -A are supported in swivelled bearings a aand b '6, as usual, but the lower ends of Said shafts, linstead ofextending down'toreceive and have'fastened rigidly thereto thedrivinggears .C C, assuch machines have heretofore been constructed,only gear down far enough to have the dogsc c fastened to their lowerends. v y v f i Between the dogs c c and the swivelled bearings areplaced,'upon the shafts B B, balls d d, the necks e e of which have earswhich project up into holes `in the bearings '6 d, 4which prevent theballs d d fro'm turning withrthe shafts. o 1

The nocksfj-e of the gears C C turn and are supported in bearings D D,which are tted to slide freely back and forthbetween-thc bars E E, thelips or flanges gig of the boxes D D projecting past or by both thelower and'upper edges of said bars, for the purpose o f keepingsal'dvboires from slipping up or down while the machine is in use, orwhile the boxes are beingmoved laterallyfas will be hereafterrexplained.

To thel sliding boxes D D are .fastened the upperendsv'of' gnidefpiecels7th, the lower ends of which are fitted to gloovesl l in the hnbs ofgears F F lupon the driving-shaft Gr, and with which they turn, havingsplines to {it the slot or groove 2 in'saidshaft. Y o

It will thus be seen that the gears C C, ywith thcirrespectivedriving-gears F F, can be moved nearer to o1' farther from eachother,without-disturbing or changing the mesh of either set of gears. Y

The upper end s ofthe necksff of the gears C iC are concaved out, toreceive the balls m m, as fully indicated in iig. 3 of the'accompanyingdraw-ings'. i

The stems n n of ballsm m extend up.thronglr`the caps c o, and enterholes inthe lower ends oi' shafts B B. `Upon the upper ends ofthe necksff are fastened collar-pieces pp, the lowersides of which rest and turnlupon the Atops ofthe sliding boxes D D. while to their upper sides arefastened the cap-pieces o o,`which retain the balls m m in place. l i

From the collar-pieces p'p project wings 4 4, into which are inserted orfastened pins 5 5, which strilgpe against the dogs c c, when gears C Care in motion, thereby giving the-proper motion toI shafts B B andfcedrolls A A. l v

Theballs cl d are'enclosedl by 'the friction-rings 6 6each ring beingmjade in two pieces, so that the rings can be easily applied to theballs cl Ichaud at the same timejitted into the cam-grooves 7 7 in thecams 8 8, after which the halves ofeach ring are fastened together bypins or screws, as indicated in the drawings, (see igs. 3, 5, and 6.)v

The cams 8 8 are arranged loosely ron the stud 9, which projects downfrom the cross-slide piece H, the ends of which are fitted to slide onflanges or ways of the`central parts EPH of frame o o, `which issupported on the front of the mainframe I of the machine, a pin, 10,being employed in this instance to support and keep the cams in placeupon stud 9. Plates, a a', are fastened to the upper sides of theparts'H H', to keep the ends of slide-piece H in place.

Cams'S 8 may`be made separately, or they may be made in one piece.l Iprefer to malte them separately, but so arranged as to both turn uponthesame stud or journal, and then fasten them together by a pin orscrew, 11, shown in dotted lines, fig. 5, ofthe drawings. i

. J is a handle, fastened to oneof the cams, and by which, when the camsare fastened together, the shafts 'B B and rolls vA A can be quicklydrawn vorrnoved towards or from each other. When lever J is moved in onedireetionfthey are drawn closer or nearer to each other, as shown in redlines, iig. 5, and a cord, chain, or rope, K, with a weight attached,maybe fastened to handle J, to constantly draw the feed-rolls A Atogether, and thus give the necessary pressure uponthe material beingresawed, while, at the same time, the feed-rolls are left free toconform ltothe inequalities of the board or stick being fed through therolls A A to the saw M.

It is well tohave an adjustable or'otherstop to arrest lever J at a.given point, and thus prevent the 'feedrolls from being drawn too neartogether when the material being sawed has been fed quite throughbetween the rol-ls. v l

The/stands N N, which support the swivel-bearings a a and'b 6, arefitted, as usual, to slide back and forth in dove-tailed grooves-inframeO O, fastened tothetop of the main frame, whilst, in additionthereto, lbearings a a are supported by the pieces P P, which can beadjustedpn the tops of the stands N N, by means of screws 12 12, to givethe feed-rolls any desired inclination. f Y

Aserew-shaft, Q, is ltted to the side of the main frame, with its screwpart passing through the slidepiece H, whereby the. latter, togetherwith the feed-rolls and their operating-mechanism, can be moved ineither direction, at the pleasure of the operator, and that, too, whileall the parts so moved remain 'in their proper relative positions asrespects each other. y

By my improvements, 'it will be seen that'the operator, after moving oneroll to the desired position by shaft Qfean disconnect thev cams 8 8,when one feed-roll will remain in a {ixed position, whileall the varyingmovements occasienedby the inequalities of the material being fed inwill be indicated by the other roll. Again, when cams S 8' areconnected, themction of the feed-rolls will be uniform in bothdirections, whereby the cut will be central throughout.

Again, it does not aiect the mesh of gears C C with' the geaas F F, whenthe rolls A A are inclined in either 'direct-ion, consequently thegearingalways'runs smooth and easy; nor is there any binding of theparts, owing to the peculiar construction and arrangement of themechanism. Y

The eams 8 8 and gears C C always move in horizontal positions, the'balls d d and m m turning'freely in their sockets, to preven'tallbinding of the parts.

Having described' my improvements in reserving-machines, what I- claimas new, and of my invention, and desire to secure by Letters Patent, is

1. The combination, with the shafts B B, or either, of the camsS 8, oreither, and friction-rings 6 6, constructed to operate-'substantially asand for the purposes set forth. l

2. The combination, with the shafts B B, of the cams 8 8, friction-rings6.6, and balls CZ d, substantially as and for the purposes se't forth.

3. The combination, with the adjustable feed-rolls, the lower ends ofwhose shafts are received in balls d (l, mounted inthe machine asdescribed, of the sliding gears for driving said `rolls, and the balls mand stem u, for connectingthe gears with the shafts of the rolls, underthe arrangement and'for -operationas herein shown and set forth. y

4. In combination with the parts claimed in thepreceding clause, IAclaim the dogs c, collars p, wings 4, and pins 5, mounted upon thehubs-of the gear-.vheels and feed-roll shafts, in the manner and for thepurposes shown and/specified;

A 5. The combination, with the earns S 8, of the handle orv arm J andfastening-screw 11, for the purpose of allowing one t'o-be operatedindependently of Vthe other,l substantially asand for the purposes -setforth.

FRANK J. PLUMMER.

Witnesses:

'lnosf H. Denen, Guo'. H. Minnen.

